Liquid Crystal Process, Composition, Or Product Patents (Class 430/20)
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Patent number: 5368991Abstract: Disclosed is a photosensitive resin composition for use in a light-shielding film, comprising a photosensitive resin and a light-shielding coloring material, wherein light transmission properties after formation of the light-shielding film are controlled by the light-shielding coloring material so that (i) the light transmission through the light-shielding film is 1% or more in at least one wavelength of a light wavelength region of from 330 nm to less than 425 nm, and (ii) the light transmission through the light-shielding film is 2% or less in a light wavelength region of from 425 to 650 nm.Type: GrantFiled: July 21, 1993Date of Patent: November 29, 1994Assignee: Tokyo Ohka Kogyo Co., Ltd.Inventors: Kiyoshi Uchikawa, Hiroshi Komano, Toshimi Aoyama, Katsuyuki Ohta
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Patent number: 5365356Abstract: A method of fabricating an encapsulated liquid crystal display includes adhering a pair of rectangular, interior substrates, at least one of which is flexible, to each other on three of the four sides of their peripheries. A liquid crystal material is then introduced between the interior substrates. The interior substrates are placed between a pair of rigid exterior substrates. A transparent resin is then applied between the interior substrates and the exterior substrates. The exterior substrates are forced toward the interior substrates. The transparent resin is then cured, thereby adhering the interior substrates to the exterior substrates.Type: GrantFiled: March 16, 1994Date of Patent: November 15, 1994Assignee: Minnesota Mining and Manufacturing CompanyInventor: Francis J. McFadden
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Patent number: 5361152Abstract: A process for producing a liquid-crystal cell which comprises the steps of:(a) providing a curable sealant portion in the periphey of the side of an electrode plate that has an electrode or electrodes;(b) (i) coating a ferroelectric liquid-crystal composition on the portion surrounded by said sealant portion, with a spacer being preliminarily provided in said portion;(ii) coating spacer-containing ferroelectric liquid-crystal composition on the portion surrounded by said sealant portion; or(iii) coating a ferroelectric liquid-crystal composition on the portion surrounded by said sealant portion and thereafter providing a spacer over said composition;(c) defoaming the coated layer of the liquid-crystal composition by heating during or after evacuation;(d) placing the other electrode plate in such a way that the side of said other electrode plate which has an electrode or electrodes faces the side of said one electrode plate containing the thermally defoamed coated layer of the liquid-crystal composition and coType: GrantFiled: February 5, 1993Date of Patent: November 1, 1994Assignee: Hoechst AktiengesellschaftInventors: Takamasa Harada, Claus Escher, Gerhard Illian, Dieter Ohlendorf, Heinz Rieger, Norbert Rosch
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Patent number: 5358810Abstract: In a method of manufacturing a liquid crystal display device of this invention, a light transmittance of an overcoating layer of the liquid crystal display device is partially reduced to form a part of a light-shielding portion. Therefore, a color filter can be easily formed, and hence the device can be manufactured at high productivity and low cost.Type: GrantFiled: November 23, 1993Date of Patent: October 25, 1994Assignee: Kabushiki Kaisha ToshibaInventor: Thunekazu Yoshino
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Patent number: 5348828Abstract: A process for producing an electrode substrate for use in a liquid crystal device in which a laminate film of a transparent conductive film and a metal film is formed on a first side of a transparent substrate. The laminate film is pattern-etched so as to form islands of the laminate film in a predetermined pattern. A photosensitive anaerobic colored resin is applied on the transparent substrate on which the islands of laminate film arranged in the predetermined pattern. The transparent substrate is uniformly exposed to a light from a second side of the substrate opposite to the first side in an oxygen-containing atmosphere. Unexposed portions of the photosensitive anaerobic resin are removed so as to leave the photosensitive anaerobic resin only in the spaces between adjacent islands of the laminate film, for forming a light-shielding film in each of the spaces.Type: GrantFiled: February 26, 1991Date of Patent: September 20, 1994Assignee: Canon Kabushiki KaishaInventors: Tatsuo Murata, Kazuya Ishiwata, Toshifumi Yoshioka
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Patent number: 5338240Abstract: A method of making a light-influencing liquid crystal display wherein no spacers are placed in the display regions, in order to improve the contrast of the liquid crystal display. The method comprises the steps of preparing a first and second substrate, forming a first plurality of pixel electrodes on the first substrate, forming a plurality of thin film transistors (TFT) on the first substrate, forming a second plurality of pixel electrodes on the second substrate, forming a plurality of black stripes and spacers on the second substrate in a predetermined pattern, securing the substrates together with the first plurality of electrodes facing the second plurality of electrodes and with the spacers between the substrates, and applying light-influencing display material between the substrates.Type: GrantFiled: July 15, 1992Date of Patent: August 16, 1994Assignee: Gold Star Co., Ltd.Inventor: Jin Young Kim
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Patent number: 5332520Abstract: A liquid-crystalline polymer of virtually uniform molecular weight, obtainable by polymerizing identical or different monomers of the formula I ##STR1## where R is hydrogen, chlorine or methyl,A is a flexible, long-chain moiety which acts as a spacer, is a mesogenic moiety built up from at least two aromatic rings which are linked to one another in a linear or approximately linear manner, andC is an optically active, chiral moiety,in from 0.01 to 0.1 molar solution in an inert organic solvent in the presence of from 1 to 40 mol %, based on the monomers, of a free-radical initiator, at from 40.degree. to 60.degree. C. for from 100 to 140 hours, and subsequently isolating the polymerization product from the reaction mixture, and the use thereof for building up recording layers for laser-optical and electrical recording elements and for electrophotography and for building up liquid-crystalline display elements.Type: GrantFiled: May 8, 1992Date of Patent: July 26, 1994Assignee: BASF AktiengesellschaftInventors: Volker Bach, Karl-Heinz Etzbach, Karl Siemensmeyer
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Patent number: 5328816Abstract: A process for producing an information recording medium comprising a substrate and provided thereon a recording layer and protective layer comprises the steps of forming on one substrate sheet a plurality of grooved preformats used for information recording mediums, forming a recording layer on the substrate sheet having thereon said plurality of grooved preformats, forming a protective layer on the substrate sheet on which said recording layer has been formed, and cutting the resulting substrate sheet into individual information recording mediums.Type: GrantFiled: July 9, 1992Date of Patent: July 12, 1994Assignee: Canon Kabushiki KaishaInventors: Miki Tamura, Hiroyuki Sugata, Osamu Kanome, Yukitoshi Okubo, Mizuho Hiraoka, Masataka Yashima
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Patent number: 5326661Abstract: This invention provides novel polymers which contain discrete photoconductive and electrooptic moieties. The moieties may exist as part of the main chain of the polymer or as pendant side chains. The polymers have utility as transparent photorefractive media in photorefractive devices.Type: GrantFiled: November 13, 1991Date of Patent: July 5, 1994Assignee: Hoechst Celanese Corp.Inventors: Michael Sansone, Harris A. Goldberg, James L. McGinnis, Karsten Blatter, Ching F. Shu, Anthony East
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Patent number: 5316893Abstract: A switching electrode especially for controlling image points in liquid crystal indicators has a ground electrode, a dielectric, and a counterlectrode. Parameters of the switching element are controllable in a broad region independently from one another. The production of the switching element can be easily integrated in production process of a liquid crystal indicator.Type: GrantFiled: January 3, 1991Date of Patent: May 31, 1994Inventors: Ernst Luder, Volker Hochholzer
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Patent number: 5314770Abstract: A method for producing a color filter involves (A) forming a photosensitive coating film on an electrically conductive layer formed on a surface of a substrate, and exposing the photosensitive coating film trough a mask having patterns of at least three different degrees of light transmittances; (B) developing and removing a photosensitive coating film portion registering with one of the patterns of smallest and largest degrees of light transmittances for exposing the electrically conductive layer and electrodepositing a colord coating on the exposed electrically conductive layer for forming a colored layer thereon, operation of developing and removing the photosensitive coating film followed by electrodeposition being repeated for the respective patterns of different degrees of light transmittances in sequence of difference in transmittances for producing different colored layers, respectively; (C) selectively forming a metal layer in interstices present between the colored layers, and (D) transcribing the cType: GrantFiled: April 22, 1992Date of Patent: May 24, 1994Assignee: Nippon Oil Co., Ltd.Inventors: Yukio Yamasita, Haruyoshi Sato, Toru Nakamura, Hitoshi Yuasa, Yutaka Otsuki
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Patent number: 5314769Abstract: A method for producing a color filter involves (A) forming a photosensitive coating film on a transparent electrically conductive layer formed on a surface of a transparent substrate and exposing the photosensitive coating film through a mask having patterns of at least three different degrees of light transmittances; (B) developing and removing a photosensitive coating film region registering with one of the patterns of smallest and largest degrees of light transmittances for exposing the transparent electrically conductive layer and electrodepositing a colored coating on the exposed transparent electrically conductive layer for forming a colored layer thereon, operation of developing and removing the photosensitive coating film and electrodepositing the colored coating being repeated for the respective patterns of different degrees of light transmittances in sequence of difference in light transmittances to form different colored layers, respectively; and (C) selectively forming a metal layer on at least onType: GrantFiled: April 22, 1992Date of Patent: May 24, 1994Assignee: Nippon Oil Co., Ltd.Inventors: Yukio Yamasita, Haruyoshi Sato, Toru Nakamura, Hitoshi Yuasa, Yutaka Otsuki
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Patent number: 5312703Abstract: A process for the reversible or irreversible production of an image by imagewise exposure of a recording layer to energy in the presence or absence of an electrical and/or magnetic field, resulting in a pattern of surface charges on the surface of the recording layer corresponding to the imagewise exposure to energy. The recording layer consists essentially ofan organic material which solidifies in a glass-like manner, is non-photoconductive or substantially non-photoconductive and contains permanent dipoles, in whichthe pattern of surface charges is produced without or substantially without the formation of free charge carriers by reversible imagewise alignment of at least some of the permanent dipoles present in the recording layer.Type: GrantFiled: March 13, 1992Date of Patent: May 17, 1994Assignee: BASF AktiengesellschaftInventors: Gerhard Wagenblast, Volker Bach
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Patent number: 5304438Abstract: A charge image recording medium (RM) comprising a lamination of an electrode (E) and at least one of a light-modulation material layer (PMLQ) and an insulating polymer film or dielectric layer (IL), wherein said light-modulation material layer (PMLQ) comprises a polymer-dispersed liquid crystals film comprising a liquid crystal dispersed in a polymer. The insulating polymer film (IL) may be provided thereon with a thin film (CL) of a fatty acid or a thin film (CL) of a metal salt of a fatty acid.The light-modulation material layer (PMLQ) comprising a polymer-dispersed liquid crystals film comprising a liquid crystal dispersed in a polymer may also be provided thereon with a thin film (CL) of a fatty acid or a thin film (CL) of a metal salt of a fatty acid.Type: GrantFiled: July 20, 1992Date of Patent: April 19, 1994Assignee: Victor Company of Japan, Ltd.Inventors: Toshio Konno, Tadayuki Shimada, Atsushi Nakano
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Patent number: 5304439Abstract: A method of manufacturing an improved an electrophoretic display having a cathode/grid/local anode matrix and a remote anode includes forming the local anode lines in the same plane as the grid lines from the same material and in the same fabricating step. The local anode lines are insulated from the grid lines and are interleaved therewith, each being formed on a common layer of photoresist. It is preferred that each grid line be associated with one local anode line, that the grid lines have tines and that the local anode lines be disposed between the tines.Type: GrantFiled: January 21, 1993Date of Patent: April 19, 1994Assignee: Copytele, Inc.Inventors: Frank J. Disanto, Denis A. Krusos, Frederic E. Schubert
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Patent number: 5296321Abstract: A photorecording element consists essentially of a transparent substrate, a layer of a macromolecular compound capable of undergoing a reversible change in structure upon exposure to light, deposited by adsorption on the transparent substrate, and a liquid crystal layer disposed directly on the layer of macromolecular compound. A method for the production of the photorecording element comprises applying on a transparent substrate a mixture of a liquid crystal substance with a macromolecular compound capable of undergoing a reversible change in structure upon exposure to light and allowing the applied layer of the mixture to stand at rest or by first applying the macromolecular compound on the transparent substrate and then adding the liquid crystal substance thereto. A liquid crystal cell incorporating the photorecording element is also disclosed.Type: GrantFiled: December 29, 1992Date of Patent: March 22, 1994Assignees: Agency of Industrial Science & Technology, Ministry of International Trade & IndustryInventors: Yuji Kawanishi, Kunihiro Ichimura, Takashi Tamaki, Takahiro Seki, Mitsuhiro Ikeda
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Patent number: 5285298Abstract: A color image display apparatus includes: an image recording medium comprising a recording layer capable of selectively forming a light-scattering state and a transparent state, and a color filter having a pattern of plural color segments operatively associated with the recording layer, a light source, a viewing position, and display means for selectively sending to the viewing position a colored optical image composed of scattered light having passed through the recording layer. The display means may include direction means for directing light from the light source to be incident to the recording layer in a direction not normal to the recording layer.Type: GrantFiled: July 17, 1992Date of Patent: February 8, 1994Assignee: Canon Kabushiki KaishaInventors: Shuzo Kaneko, Kazuo Yoshinaga, Kazuo Isaka, Takashi Kai, Yomishi Toshida
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Patent number: 5276541Abstract: A method for forming a liquid crystal display incorporating a first substrate having switching elements and electrodes connected to the elements, a second substrate, a sealing member, and a liquid crystal material wherein during manufacturing the electrodes are grounded to the device for forming the sealing member and then the sealing member is formed on the first substrate.Type: GrantFiled: March 15, 1991Date of Patent: January 4, 1994Assignee: International Business Machines CorporationInventors: Kenji Terada, Masato Shoji
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Patent number: 5258864Abstract: A method of fabricating an array of MIM type devices together with associated address conductors and pad electrodes on a common support (11) suitable for use as a component in an active matrix display device, involves depositing a first, conductive, layer (30) and a second selectively etchable layer (31) in succession over the support, performing a photolithographic patterning process (35) to leave regions (32,33) of the layers determining eventual pad electrodes (25) and address conductors (28) with bridging portions (34), and thereafter performing further processing operations involving the deposition of further layers (36, 40, 41), including an insulating layer (40) and a further conductive layer (41), and the etching of particular layers, together with lift-off procedures, to define on the support an array of pad electrodes each connected to an address conductor through a MIM type device (10,45) at the region of the bridging portion.Type: GrantFiled: April 16, 1992Date of Patent: November 2, 1993Assignee: U.S. Philips CorporationInventor: John M. Shannon
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Patent number: 5256506Abstract: A unique method/system for simultaneously creating and transferring a contrasting pattern of intelligence on and from a composite ablation-transfer imaging medium to a receptor element in contiguous registration therewith is improvedly radiation sensitive and versatile, is kinetically rapid and not dependent on a sensitized ablative topcoat, and is well adopted for such applications as, e.g.Type: GrantFiled: February 26, 1992Date of Patent: October 26, 1993Assignee: Graphics Technology International Inc.Inventors: Ernest W. Ellis, Diane M. Foley, Dana R. Arnold
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Patent number: 5248576Abstract: A process for producing color filters which enable a transparent electrode for forming a coloring matter film to be used as a transparent electrode for driving liquid crystals, and a resist for a light-shielding film used in this process for forming an insulating black matrix, is disclosed. The above production method comprises forming a black matrix over electrodes other than those corresponding to the individual separated colors and, at the same time, insulating layers as electrode contact window belts by utilizing the black matrix material; forming the electrode contact window belts by forming an electrically conductive layer over the black matrix so that they connect within each electrode contact window belt unit, but do not connect with those in different electrode contact window belt units; and forming a coloring matter layer by a micellar disruption method.Type: GrantFiled: May 16, 1991Date of Patent: September 28, 1993Assignee: Idemitsu Kosan Co., Ltd.Inventors: Seiichiro Yokoyama, Hideaki Kurata, Mitsuru Eida
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Patent number: 5246804Abstract: The invention relates to a technique for retouching a pattern which is formed on one side of a substrate and which partially has defects. A method of retouching the pattern, according to the invention, comprises coating the one side of the substrate including the pattern, with a retouching protective membrane, exposing the one side of the substrate, with reference to portions having defects, filling the portions of the exposed one side of the substrate, with retouching material, and removing the retouching protective membrane. One of the retouching protective membrane and the retouching material is made of water-soluble material, while the other is made of oil-soluble material.Type: GrantFiled: August 3, 1992Date of Patent: September 21, 1993Assignee: Kyodo Printing Co., Ltd.Inventors: Tadahiro Furukawa, Toshiaki Kikuchi, Hitoshi Konno
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Patent number: 5242617Abstract: The present invention relates to a liquid crystal pigment which allows the simpler use of liquid crystals in coating applications with greatly improved appearance uniformity of the liquid crystal effect. The liquid crystal pigment comprises a laminar particle which is at least partially coated with a liquid crystalline material, which has been precipitated from a solution onto the laminar particle.Type: GrantFiled: February 9, 1990Date of Patent: September 7, 1993Assignee: Akzo N.V.Inventors: Carl W. Metzger, Jurgen Munch
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Patent number: 5236793Abstract: The invention provides a material for overcoat on a color filter for liquid crystal display, characterized in that the material comprises a water-soluble photopolymerizable substance, a cationically polymerizable, water-insoluble photopolymerizable substance, a photopolymerization initiator and a precursor of photo-setting catalyst, and a material for a color filter which comprises a mixture of the material for overcoat and a coloring agent.The invention also provides a process for forming an overcoat on a color filter, or for forming a color filter characterized in that the process comprises the steps of applying the material for color filter overcoat or the material for a color filter, subjecting the coating to exposure to light and performing development using an aqueous solution of alkali.Type: GrantFiled: February 6, 1992Date of Patent: August 17, 1993Assignee: Okuno Chemical Industries Co., Ltd.Inventors: Kenichi Nishiwaki, Shuji Matsushima, Kenzo Fukuyoshi, Toyoshi Nishimoto
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Patent number: 5234799Abstract: A photochromic material containing a copolymer of a spirobenzothiopyran derivative prepolymer and a liquid crystal prepolymer. In addition, a rewritable optical recording medium using the photochromic material. A rewritable optical recording medium obtained by coating a dispersed material, which is obtained by uniformly dispersing a spirobenzothiopyran derivative compound in a thermoplastic resin, on a substrate. A photochromic material capable of controlling a colored state and a decolorized state in a photon mode or a heat mode using an ultraviolet light source and a near-infrared light source. A rewritable optical recording medium capable of rewriting an information in a photon mode using a semiconductor laser.Type: GrantFiled: March 25, 1992Date of Patent: August 10, 1993Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Suguru Nagae, Sei Tsuroda, Kenji Nomura, Kazuhiko Tsutsumi, Yoshiyuki Nakaki
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Patent number: 5212027Abstract: Novel laser-optical recording elements which can be repeatedly erased and recorded on contain recording layers (a) which exhibit enantiotropic, ferroelectric smectic liquid crystalline (S.sub.c*) behavior, so that they can be switched back and forth between two thermodynamically stable, optically distinguishable ferroelectric smectic liquid crystalline S.sub.c* order states on exposure to a laser beam of sufficient luminous power, by applying an external electric field. The recording layers (a) themselves consist mainly or exclusively of novel polymers P having chiral mesogenic side groups.Type: GrantFiled: December 30, 1991Date of Patent: May 18, 1993Assignee: BASF AktiengesellschaftInventors: Karl-Heinz Etzbach, Gerhard Wagenblast, Wolfgang Brox, Axel Paul, Volker Bach
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Patent number: 5200283Abstract: An information recording medium includes a first transparent electrode, and a carrier transport layer formed on the first transparent electrode for generating an electric current on the basis of fed carriers. A carrier generation layer formed on the carrier transport layer serves to generate carriers corresponding to a distribution of an intensity of incident information-writing light containing information, and serves to feed the generated carriers to the carrier transport layer. An electric power supply electrically connected to the first transparent electrode serves to generate an electric field corresponding to the distribution of the intensity of the incident information-writing light in cooperation with the carrier transport layer and the carrier generation layer.Type: GrantFiled: February 6, 1992Date of Patent: April 6, 1993Assignee: Victor Company of Japan, Ltd.Inventors: Atsushi Nakano, Dai Imanishi, Tadayuki Shimada, Shigeo Shimizu
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Patent number: 5194548Abstract: Disclosed is an organic nonlinear optical material comprising a compound having a conjugate main chain in the molecule and having donor groups D and acceptor groups A added onto the conjugate main chain in the sequence of . . . , D, D, A, A, D, D, . . . , in which the distance between adjacent D's and the distance between adjacent A's are shorter than the distance between adjacent D and A with respect to the distance between the atoms on the main chain to which the respective groups are bonded.In this organic nonlinear optical material, since electron wave functions are modified, enhanced quadratic and cubic nonlinear optical effects can be attained. Accordingly, the organic nonlinear optical material can be advantageously utilized for an electro-optical element and an optical-to-optical element.Type: GrantFiled: January 26, 1990Date of Patent: March 16, 1993Assignee: Fujitsu LimitedInventor: Tetsuzo Yoshimura
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Patent number: 5183725Abstract: An electrode pattern forming method comprising the steps of: forming a transparent conductive film on a substrate, covering said transparent conductive film with an aluminum film, forming a resist material film for etching on said aluminum film, exposing said resist material film followed by developing by immersing said substrate in an electrolyte to form a resist pattern, and patterning said aluminum film using said resist pattern as a mask;the formation of said resist pattern in said electrolyte being conducted with another transparent conductive film which is in direct contact with said electrolyte and electrically connected to said aluminum film.Type: GrantFiled: October 1, 1990Date of Patent: February 2, 1993Assignee: Sharp Kabushiki KaishaInventors: Hiromi Nishino, Keiji Tarui, Hideyuki Toyoshi, Tatsuo Morita
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Patent number: 5171650Abstract: A unique method/system for simultaneously creating and transferring a contrasting pattern of intelligence on and from a composite ablation-transfer imaging medium to a receptor element in contiguous registration therewith is improvedly radiation sensitive and versatile, is kinetically rapid and not dependent on a sensitized ablative topcoat, and is well adopted for such applications as, e.g.Type: GrantFiled: May 29, 1991Date of Patent: December 15, 1992Assignee: Graphics Technology International, Inc.Inventors: Ernest W. Ellis, Diane M. Foley, Dana R. Arnold
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Patent number: 5169737Abstract: In a process for depositing a planarising material in spaces between a pattern of regions, such as dye stripes or dots, on a substrate, the planarising material is deposited as a layer over the pattern. The substrate is irradiated, from the reverse side, by a source of radiation, such as UV, to which the pattern material is opaque and to which the planarising material is responsive such that it is rendered insoluble to a particular solvent. The radiation acts on only those parts of the planarising material which are in the spaces. The remainder of the planarising layer is then removed by use of the solvent. Alternatively, or additionally, an ITO or other UV transparent layer may be formed over the pattern and a layer of resist formed thereover. The radiation then passes through the spaces and acts on only the resist areas over the spaces to render them soluble. Those areas and the ITO layer beneath them are then removed by etching, leaving ITO areas accurately aligned with the pattern.Type: GrantFiled: October 24, 1989Date of Patent: December 8, 1992Assignee: The General Electric Company, p.l.c.Inventor: Stephen A. Haws
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Patent number: 5164287Abstract: A photochromic material containing a copolymer of a spirobenzothiopyran derivative prepolymer and a liquid crystal prepolymer. In addition, a rewritable optical recording medium using the photochromic material. A rewritable optical recording medium obtained by coating a dispersed material, which is obtained by uniformly dispersing a spirobenzothiopyran derivative compound in a thermoplastic resin, on a substrate. A photochromic material capable of controlling a colored state and a decolorized state in a photon mode or a heat mode using an ultraviolet light source and a near-infrared light source. A rewritable optical recording medium capable of rewriting an information in a photon mode using a semiconductor laser.Type: GrantFiled: February 14, 1991Date of Patent: November 17, 1992Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Suguru Nagae, Sei Tsunoda, Kenji Nomura, Kazuhiko Tsutsumi, Yoshiyuki Nakaki
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Patent number: 5162934Abstract: A method of manufacturing a liquid crystal display element comprising a pair of substrates and a liquid crystal composition injected into and cured in an evacuated cell constituted with the substrates, wherein the degree of vacuum in the cell is from 0.5 to 10 mmHg, the composition forms a liquid crystal and polymer composite in which the nematic liquid crystal is dispersed and held in the resin matrix, and light transparent-scattering states are attained by agreement and disagreement between the refraction index of the liquid crystal and the refractive index of the resin matrix under control of an electric field applied across the electrodes. Residual bubbles left in the cell are disposed in the peripheral portion not constituting the display portion or in the pocket portion formed integrally to the peripheral portion.Type: GrantFiled: March 20, 1992Date of Patent: November 10, 1992Assignee: Asahi Glass Company Ltd.Inventors: Tomoki Gunjima, Hiroshi Kumai, Satoshi Niiyama
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Patent number: 5130831Abstract: A particulate spacer for use in a liquid crystal display cell, electrochromic display device, or the like is provided. The particulate spacer comprises a core particle and a functional layer formed on the surface of the core particle.Type: GrantFiled: June 4, 1990Date of Patent: July 14, 1992Assignee: Sekisui Kagaku Kogyo Kabushiki KaishaInventors: Minoru Kohara, Kazuo Saiuchi, Kazuhiko Kanki, Hisayuki Matsuda, Shinzo Yamada, Kunikazu Yamada
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Patent number: 5120623Abstract: A method of producing a substrate plate for a liquid crystal cell with black matrix areas in which blackened polymer material is already deposited before the structured areas of photosensitive resist overlying the structured electrode areas are removed. Rather, these structured areas of photosensitive resist are removed only after the blackened polymer material has been hardened.This processing sequence has the advantage that no special alignment processes are needed in order to arrange the black matrix areas accurately between the electrode areas.Type: GrantFiled: December 7, 1990Date of Patent: June 9, 1992Assignee: Nokia Unterhaltungselektronik GmbHInventors: Stefan Brosig, Jurgen Waldmann
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Patent number: 5118586Abstract: In accordance with the present invention, there are provided photo-recording media comprising photochromic compounds having been dispersed or dissolved in stretched films or nematic liquid crystals, the transition moment of light absorption of said photochromic compounds being orientated in a definite direction. In the photo-recording media as provided, an information recorded in the photochromic compounds can be read out without destroying the same.Type: GrantFiled: March 20, 1989Date of Patent: June 2, 1992Assignee: Mitsui Petrochemical Industries, Ltd.Inventors: Yukari Hattori, Junichi Yoshitake, Tooru Yamanaka
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Patent number: 5116704Abstract: A barrier rib forming method for a PDP including a process of forming an emulsion layer as a filmed deposition upon a glass substrate having transparent electrodes thereon. Exposing the film to ultraviolet rays to produce electrodes with a proper pattern of an emulsion layer thereon. Printing, drying and heating a glass paste deposited on said emulsion. Ultrasonically vibrating the glass substrate to remove the emulsion layer and glass paste from the glass substrate.Type: GrantFiled: September 6, 1989Date of Patent: May 26, 1992Assignee: Samsung Electron Device Co., Ltd.Inventor: Ki-Duck Kwon
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Patent number: 5110698Abstract: A rewritable or repeatedly employable recording medium having a base and a recording layer film provided on said base, characterized in that said recording layer film is formed by a thermotropic cholesteric liquid crystal polyester.Type: GrantFiled: April 9, 1990Date of Patent: May 5, 1992Assignee: Nippon Oil Company Ltd.Inventors: Hajime Hara, Shingo Orii, Tetsuo Satoh, Tomohiro Toya, Shigeki Iida
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Patent number: 5103332Abstract: A color image forming method provides clear color images with good color balance by thermally controlling a thermosensitive medium, such as polymer liquid crystal. The medium is capable of reversibly assuming optical states of being transparent and of scattering light, and allows picture-element display areas in at least two colors to be composed on a surface thereof. Picture elements within color areas are selected if they correspond to the color whose spectral transmission center is, among those of the colors to be displayed, closest to the longest wavelength involved. Heat is applied such that the maximum haze degree of the selected picture elements is greater than that of picture elements corresponding to any of the other colors.Type: GrantFiled: July 10, 1990Date of Patent: April 7, 1992Assignee: Canon Kabushiki KaishaInventors: Shuzo Kaneko, Toshikazu Ohnishi, Takashi Kai
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Patent number: 5101011Abstract: An aligning agent for liquid crystals containing a polyamino acid having no optical activity.Type: GrantFiled: July 20, 1990Date of Patent: March 31, 1992Assignee: Ajinomoto Co., Inc.Inventors: Naoko Mikami, Takao Sakurai
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Patent number: 5082755Abstract: Photoresist layers are rapidly exposed in a pattern determined by electronically stored data by exposure of the photoresist through a high resolution liquid crystal shutter array.Type: GrantFiled: December 17, 1990Date of Patent: January 21, 1992Assignee: General Electric CompanyInventor: Yung S. Liu
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Patent number: 5081004Abstract: Method for producing a display screen with a matrix of transistors provided with an optical mask. This method consists of depositing on a substrate (100) a layer of black polyimide (102) absorbing the visible light and followed by a layer of photosensitive resin, of insolating the resin through a mask masking the channels of the transistors to be embodied, of eliminating the zones insolated with the resin and the sub-adjacent zones of the polyimide, of depositing an ITO layer (106) on the unit, of eliminating the rest of the resin and the ITO surmounting said resin so as to form the drains/sources of the transistors, of successively depositing a layer of hydrogenated amorphous silicon (110), a layer of silicon nitride (112) and a layer of aluminium (114), then of photoengraving the stack of these layers so as to form the grid of the transistors, and finally to render passive the unit with a layer of silicon (116).Type: GrantFiled: November 2, 1989Date of Patent: January 14, 1992Assignee: L'Etat Francais represente par le Ministre des Postes, des Telecommunications et de l'Espace (Centre National D'Etudes des TelecommunicationsInventors: Bruno Vinouze, Hugues Lebrun
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Patent number: 5077157Abstract: There is disclosed methods for fabricating electrophoretic displays. Essentially the methods employ selective materials such as different metals which are capable of being etched by different etchants. In this manner, a laminate is provided to form a grid matrix which is insulated from a cathode matrix which grid matrix is also insulated from a second anode matrix. The entire display utilizes a local or second anode and a remote anode to further control pigment particle migration. The display is fabricated by two methods both of which employ selective etching of the parallel line type of display electrodes which constitute a cathode, a grid and a local anode.Type: GrantFiled: November 24, 1989Date of Patent: December 31, 1991Assignee: Copytele, Inc.Inventors: Frank J. DiSanto, Denis A. Krusos, Frederic E. Schubert
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Patent number: 5045418Abstract: An electrode plate for a display device is here disclosed which is characterized in that a protective material of elements constituting the electrode plate which is to be patterned comprises a novolak type epoxy resin into which a photosensitive group and a group to make the resin alkaline liquid-soluble are introduced. The protective material can be applied to a color filter coating layer on a color filter.Type: GrantFiled: January 30, 1989Date of Patent: September 3, 1991Assignee: Toppan Printing Co., Ltd.Inventor: Kenzo Fukuyoshi
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Patent number: 5045419Abstract: According to a pattern exposure/transfer method disclosed in the present invention, an optical modulating mask whose optical contrast can be changed by electrical control is used and an optical pattern image of the optical modulating mask is exposed/transferred to an object to be exposed. The present invention also discloses a pattern exposure/transfer mask apparatus whose optical contrast can be changed by electrical control. According to the pattern exposure/transfer method of the present invention, an arbitrary pattern image can be easily formed by the optical modulating mask. The pattern exposure/transfer mask apparatus of the present invention is able to change optical contrast by electrical control, and allows easy formation of an arbitrary pattern image.Type: GrantFiled: December 26, 1989Date of Patent: September 3, 1991Assignee: Kabushiki Kaisha ToshibaInventor: Katsuya Okumura
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Patent number: 5037723Abstract: A method of manufacturing a plasma display panel formed with electrodes and barrier ribs therebetween by a photoetching method.The invention is a process for forming respectively, electrodes and barrier ribs on glass substrates by a photoetching method; and a process for spreading the pastes deposited of each material for said electrodes and barrier ribs, and removing said pastes on the watersoluble photosensitive resin.According to the invention, the plasma display panel can be manufactured more precisely and elaborately and it becomes possible to make it larger in size, while at the same time, manufacturing loss can be further reduced.Type: GrantFiled: August 31, 1989Date of Patent: August 6, 1991Assignee: Samsung Electron Device Co., Ltd.Inventor: Woo-Hyun Hwang
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Patent number: 5019476Abstract: An optical recording medium such as an optical disk, which is capable of reversibly repeating a recording/erasing cycle. This optical recording medium comprises a transparent substrate and recording layer formed on the substrate. This recording layer comprise a liquid crystalline high polymer having side chains and a dyestuff having a recording-light absorbing property. The side chain may preferably comprises mesogen group, a monocyclic or polycyclic compound such as phenyl, benzyl, naphthyl or anthryl group, and alkyl or aryl group having 1 to 18 carbon atoms.Type: GrantFiled: November 13, 1989Date of Patent: May 28, 1991Assignee: Olympus Optical Co., Ltd.Inventors: Toshiyuki Kanno, Naoyuki Ueno, Seiji Kondo, Yasuji Nagata, Jun Kanehira, Hideshi Takahashi, Yoshiko Uematsu
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Patent number: 5011756Abstract: Provided is an optical information medium which permits the reading and writing of optical information by actively using polarized light. The optical information medium comprises an information layer containing a compound which undergoes a change upon irradiation with circularly polarized light to provide a new product which is optically active, and which is distinguishable from the original compound in its interaction with polarized light. In a preferred embodiment, the optical medium comprises optical isomers which can be selectively photolyzed by circularly polarized light. While writing must be done using a circularly polarized light source, reading of the recorded information can be accomplished using either circularly polarized light or linearly polarized light.Type: GrantFiled: February 27, 1990Date of Patent: April 30, 1991Assignee: Hoechst Celanese Corp.Inventor: David E. Nikles
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Patent number: 5009972Abstract: According to the present blank plate and method for forming multi-color fluorescent planes, a photosensitive layer is formed on one side of a substrate and exposed to light from the other side thereof. The step of exposure to light is carried out with a combination of a full-color pattern including light-transmitting segments in coincidence with every color pattern with a single-color mask including light-transmitting segments corresponding to each color pattern. After the full-color pattern has been formed on the substrate, the photosensitive layer containing a fluorophore is formed and, then, exposed to light from the side of the substrate opposite to the side having the photosensitive layer formed thereon through the single-color mask attached in place, followed by development. The above steps are repeated to form a multi-color fluorescent plane having the desired pattern.Type: GrantFiled: March 28, 1989Date of Patent: April 23, 1991Assignee: Dai Nippon Printing Co., Ltd.Inventors: Naoshige Higuchi, Toru Miyake
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Patent number: 5008166Abstract: A method of manufacturing color filters in which a photosensitive film, which is used for forming filter elements, is formed on a substrate. A photomask with a given stripe pattern is placed above the photoresistive film. Under this condition, the photomasked-film is subjected to a first exposure process. The photomask is then moved in the direction of the stripes in the mask pattern. Following a second exposure process, developing, dyeing and dyeing-preventing processes are performed for color filter element formation. The foregoing steps are performed for each filter element for a specified color.Type: GrantFiled: November 8, 1989Date of Patent: April 16, 1991Assignee: Casio Computer Co., Ltd.Inventor: Toshihiro Aoki